MALIGNANT
malignant
(adjective) dangerous to health; characterized by progressive and uncontrolled growth (especially of a tumor)
Source: WordNet® 3.1
Etymology
Adjective
malignant (comparative more malignant, superlative most malignant)
Harmful, malevolent, injurious.
(medicine) Tending to produce death; threatening a fatal issue.
Antonyms
• (medicine): benign, non-malignant
Noun
malignant (plural malignants)
A deviant; a person who is hostile or destructive to society.
(historical, derogatory, obsolete) A person who fought for Charles I in the English Civil War.
Source: Wiktionary
Ma*lig"nant, a. Etym: [L. malignans, -antis, p. pr. of malignare,
malignari, to do or make maliciously. See Malign, and cf. Benignant.]
1. Disposed to do harm, inflict suffering, or cause distress;
actuated by extreme malevolence or enmity; virulently inimical; bent
on evil; malicious.
A malignant and a turbaned Turk. Shak.
2. Characterized or caused by evil intentions; pernicious. "Malignant
care." Macaulay.
Some malignant power upon my life. Shak.
Something deleterious and malignant as his touch. Hawthorne.
3. (Med.)
Definition: Tending to produce death; threatening a fatal issue; virulent;
as, malignant diphtheria. Malignant pustule (Med.), a very contagious
disease, transmitted to man from animals, characterized by the
formation, at the point of reception of the virus, of a vesicle or
pustule which first enlarges and then breaks down into an unhealthy
ulcer. It is marked by profound exhaustion and usually fatal. Called
also charbon, and sometimes, improperly, anthrax.
Ma*lig"nant, n.
1. A man of extrems enmity or evil intentions. Hooker.
2. (Eng. Hist.)
Definition: One of the adherents of Charles L. or Charles LL.; -- so called
by the opposite party.
Source: Webster’s Unabridged Dictionary 1913 Edition